LITERATURE CITED
- Clout, G. A. 1956. Chalk brood and hunchback flies. Bee Craft 38: 135.
- Maassen, A. 1916. Über Bienenkrankheiten. Mitt. Biol. Anst. Land.-Fortsn. 16: 51–58.
- Melville, R., and H. A. Dade. 1944. Chalk brood attacking a wild bee. Nature 153: 112.
- Spiltoir, C. F., and L. S. Olive. 1955. A reclassification of the genus Pericystis Betts. Mycologia 47: 238–244.